EP 1710910 A2 20061011 - Surface acoustic wave filter
Title (en)
Surface acoustic wave filter
Title (de)
Oberflächenwellenfilter
Title (fr)
Filtre à ondes acoustiques de surface
Publication
Application
Priority
JP 2005111784 A 20050408
Abstract (en)
A surface acoustic wave filter (cascaded dual mode SAW filter) includes three IDT electrodes (2,3,4),(2',3',4') disposed adjacent to each other along the propagation direction of a surface wave on a piezoelectric substrate (1) and two primary-tertiary longitudinally-coupled dual mode SAW fliers (F1;F2) cascaded and constructed by arranging grating reflectors (5a,5b,5a',5b') on both sides of three IDT electrodes. At least a pair of electrode fingers (±,²,³) are removed from the IDT electrodes disposed outside, and floating electrodes are then disposed to replace the removed electrodes.
IPC 8 full level
CPC (source: EP US)
H03H 9/02724 (2013.01 - EP US); H03H 9/6469 (2013.01 - EP US); H03H 9/6496 (2013.01 - EP US); H03H 9/14597 (2013.01 - EP US); H03H 9/6426 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1710910 A2 20061011; CN 1845455 A 20061011; JP 2006295434 A 20061026; US 2006226933 A1 20061012; US 7518471 B2 20090414
DOCDB simple family (application)
EP 06007380 A 20060407; CN 200610072570 A 20060407; JP 2005111784 A 20050408; US 39866106 A 20060406